Questions by DeenaTrundle

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1 answer 25 views

What is the mechanism of the reaction between 2-bromo-2-methylpentane with sodium ethoxide to form 2-methyl-2-pentene? Provide the detailed step-by-step process of the reaction including the intermediates formed.

asked 5 days ago in Organic Chemistry

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1 answer 29 views

How does the folding of a protein affect its function in the body, specifically in the context of enzyme catalysis?

asked Feb 20 in BioChemistry

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1 answer 20 views

What is the critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS) in water at 30°C? Provide a detailed explanation of the factors affecting the formation of micelles and how they relate to the CMC of SDS.

asked Feb 19 in Surface Chemistry

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1 answer 24 views

How do specific amino acid residues affect the stability of DNA-protein complexes? Provide experimental evidence using in vitro assays.

asked Feb 14 in BioChemistry

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1 answer 48 views

How can we increase diversity in the chemistry field and create a more inclusive environment for underrepresented groups?

asked Feb 13 in Chemical education

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1 answer 34 views

How can we design and synthesize a new antiviral drug that selectively targets the replication cycle of a specific virus without affecting healthy human cells?

asked Feb 12 in Medicinal Chemistry

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1 answer 32 views

How can the conductivity of a polymer-based electronic material be increased without sacrificing its mechanical properties?

asked Feb 6 in Polymer Chemistry

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1 answer 40 views

How can knowledge of chemical reactions be applied to understand the process behind rust formation on iron objects, and suggest a method to prevent rusting?

asked Feb 5 in Chemical education

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1 answer 54 views

Determine the standard enthalpy of formation for hydrogen chloride gas using the following data:H2(g) + Cl2(g) → 2HCl(g) ΔH = -184.6 kJ/molH2(g) + 1/2O2(g) → H2O(l) ΔH = -285.8 kJ/mol2HCl(g) + O2(g) → 2ClO(g) + H2O(l) ΔH = -518.2 kJ/mol Note: The standard enthalpy of formation for a compound is the change in enthalpy that occurs when one mole of the compound is formed from its constituent elements, with all substances in their standard state at a given temperature (usually 25°C) and pressure (usually 1 atm).

asked Feb 4 in Chemical thermodynamics

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1 answer 58 views

Calculate the standard enthalpy change for the formation of water vapor (H2O (g)) from its elements, given that the standard enthalpy of formation of hydrogen gas (H2(g)) is -241.8 kJ/mol and the standard enthalpy of formation of oxygen gas (O2(g)) is 0 kJ/mol.

asked Feb 3 in Chemical thermodynamics

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1 answer 10 views

How does the mechanism of carbon fixation during photosynthesis in plants involve the enzymes ribulose bisphosphate carboxylase-oxygenase (RuBisCO) and phosphoenolpyruvate carboxylase (PEPC) and what is its significance in the contribution of atmospheric CO2 absorption?

asked Jan 31 in BioChemistry

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1 answer 62 views

How effective are the current environmental regulations in protecting the environment from chemical pollutants, and how can they be improved to better prevent environmental damage?

asked Jan 31 in Environmental Chemistry

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1 answer 77 views

What is the concentration of calcium ions (Ca2+) in a given solution using an ion-selective electrode if the electrode reading is 0.0032 V and the calibration curve shows a linear relationship between calcium concentration and electrode potential with a slope of -28.4 mV per decade?

asked Jan 30 in Analytical Chemistry

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1 answer 67 views

A student needs to prepare 500 mL of a buffer solution with a pH of 7.5 using a weak acid HA and its conjugate base A-. HA has a pKa of 4.5 and its initial concentration is 0.2 M. What mass of HA and A- should be mixed to prepare the buffer solution?

asked Jan 22 in Chemical reactions

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1 answer 70 views

A student needs to calculate the activation energy for a reaction that takes place at an electrode with a current density of 2.5 mA/cm² at a temperature of 25°C. The reaction has a transfer coefficient of 0.5 and a standard rate constant of 2.0 × 10⁻⁶ cm/s. The student has access to the necessary thermodynamic data for the reaction. What is the activation energy for this electrochemical reaction?

asked Jan 22 in ElectroChemistry

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1 answer 46 views

What is the contribution of lifestyle factors to cognitive aging?

asked Jan 20 in Psychology

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1 answer 12 views

Who is known for the first law of psychophysics?

asked Jan 17 in Psychology

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1 answer 33 views

What is critical discourse analysis?

asked Jan 17 in Psychology

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0 answers 53 views

Who proposed the elements of well-being model?

asked Jan 17 in Psychology

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1 answer 11 views

What is action research?

asked Jan 17 in Psychology

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